[urq] Oil Pressure Switch

[Maurits Jonkergouw]

First off I need to mention I do NOT have the white 1.8 BAR single pin gauge P/N 056 919 081 E although ETKA says I should  have (F 85-E-900 001>>).

Instead, I have a (black) large 2-pin gauge (single wired to  "G"). According to ETKA this "black version" (P/N 056 919 081 A) has both 1.8 and 0-5 BAR gauges and is used on MB models.

The test on the isham-research.co.uk website mentioned below is based on the "neutral" coloured 2-pin 0-5/0.3 BAR P/N 056 919 561 found on the RR model.

So there are 2 different gauges used (MB and RR), but the test is the same for both? MB has 0-5 AND 1.8 BAR gauge output, how can it be the same??? 

Because of this contradiction I'm not sure if my test results below are correct or wrong considering "my" "...081 A" gauge perhaps has different specs???
To complicated things even more, I cannot identify the P/N of my gauge....


MY TEST RESULTS

/// HOT +80 C ENGINE ///
"G" terminal:
Engine OFF = 5-10 ohm >> 14 ohm
IDLE = 70-120 ohm >> 113 ohm
3000 RPM = 170-200 ohm >> 197 ohm

"WK" terminal:
Engine OFF = < 1 ohm >> infinite
IDLE = infinite >> 365 ohm

Disconnecting the connector does not stop the warnings, so where is that second sensor?

I do hope it's just the sensor and not really low oil pressure... I should notice this right? Car runs fine even with the warning light on.


Thanks again.




  Maurits
  http://www.isham-research.co.uk/quattro/oil_test.html
  I know this is really for the MB and RR but it suggests ways of testing the 
  senders.
  Cheers
  Keith

    ----- Original Message ----- 
    From: "Maurits Jonkergouw" <urquattro at moregraphics.nl>
    To: <urq at audifans.com>
    Sent: Saturday, March 27, 2010 1:46 PM
    Subject: [urq] Oil Pressure Switch


    > Recently I get the "please check oil level" voice-warning and idiot-light 
    > when engine is warmed up. Oil level is fine  and first suspect is the 
    > switch and second, the control relay.
    >
    > Problem is my switch is the 'big' alu 2-pin type with one connector 
    > attached, but according to ETKA, it should be a 1.8 BAR white 1-pin switch 
    > (WR-GV) P/N 056 919 081 E and I'm not sure it was there on the 'old' 
    > engine before the rebuild.
    >
    > So how does one check the oil presure switch? If the dash warning light is 
    > on, simply disconnecting the connector does not set it off, perhaps the 
    > "check oil level" warning is triggered from a different sensor?
    >
    > BTW is the oil pressure relay the same from the KV engined Coupe GT's? I 
    > have one of those as spare.
    >
    > Thanks.
    > -- 
    > .................................................................
    > Regards,
    >      Maurits.
    > .................................................................
    > 1986 quattro GV
    > .................................................................